. >> reporter: the companies argue the national security agency is going too far in the bullet collection of phone and internet date -- in the bulk collection of phone and internet data, information from classified documents leaked by edward snow deny suggesting the nsa is stealing communications from internet providers by tapping into tables connecting the servers in overseas data centers. in today's letter the tech firm said they are now tightening internal cyber security. we are focused on keeping users' data secure, deploying the latest encryption technology to prevent unauthorized surveillance. the tech firms are also fighting back against surveillance which is authorized. the internet companies say courts too often are compelling them to turn over potentially sensitive customer data. video the u.s.-based firms are worried all of this is bad for business. the yahoo chief says massive government snooping has shaken the trust of users. ing to new documents >> today we learned the nsa may have been spying on video gamers searching for terrorists. that's according to new documents that e